def register_uc_4_4_callbacks(app, plot_service) -> None:
"""
Register UC-4.4 callbacks with Dash app.
Parameters
----------
app : Dash
Dash application instance.
plot_service : PlotService
Singleton PlotService instance (shared across all callbacks).
Notes
-----
- Registers 3 callbacks: panel toggle, sample dropdown initialization,
and radar chart rendering
- Refer to official documentation for processing logic details
"""
@app.callback(
Output("uc-4-4-collapse", "is_open"),
Input("uc-4-4-collapse-button", "n_clicks"),
State("uc-4-4-collapse", "is_open"),
prevent_initial_call=True,
)
def toggle_uc_4_4_info_panel(n_clicks, is_open):
"""
Toggle UC-4.4 informative panel collapse.
Parameters
----------
n_clicks : int
Number of clicks on collapse button.
is_open : bool
Current collapse state.
Returns
-------
bool
New collapse state (toggled).
"""
logger.info(
f"[UC-4.4] 🔘 Toggle clicked! n_clicks={n_clicks}, " f"is_open={is_open}"
)
if n_clicks:
new_state = not is_open
logger.info(f"[UC-4.4] [OK] Panel toggled to: {new_state}")
return new_state
logger.info(f"[UC-4.4] ⊘ No clicks, keeping is_open={is_open}")
return is_open
@app.callback(
[
Output("uc-4-4-sample-dropdown", "options"),
Output("uc-4-4-sample-dropdown", "value"),
],
[
Input("merged-result-store", "data"),
Input("uc-4-4-accordion-group", "active_item"),
],
prevent_initial_call=True,
)
def initialize_sample_dropdown_uc_4_4(
merged_data: Optional[dict], active_item: Optional[str]
) -> Tuple[list, None]:
"""
Initialize sample dropdown with KEGG data.
This callback populates the dropdown menu with available samples
extracted from processed KEGG data, enabling users to select
specific samples for functional fingerprint analysis.
Data Processing (inline):
1. Extract KEGG data from store
2. Validate 'Sample' column exists
3. Extract unique samples
4. Sort alphabetically
5. Create dropdown options
Parameters
----------
merged_data : Optional[dict]
Pre-processed merged data stored in merged-result-store.
Expected structure: dict with 'kegg_df' key.
active_item : Optional[str]
Currently active accordion item (triggers re-initialization).
Returns
-------
Tuple[list, None]
- First element: List of dropdown option dictionaries with
label/value pairs for sample selection. Empty list
if no data available.
- Second element: Default selection value (None for no
initial selection).
Raises
------
PreventUpdate
If no data available or required column not found.
"""
logger.info(
f"[UC-4.4] 🔄 Dropdown init triggered, " f"data type: {type(merged_data)}"
)
if not merged_data:
logger.debug("[UC-4.4] No data in store, preventing dropdown init")
return [], None
# Check if this is initial call with empty/invalid data
if isinstance(merged_data, dict) and not merged_data:
logger.debug("[UC-4.4] Empty dict in store, preventing dropdown init")
return [], None
try:
# Extract KEGG DataFrame from store
if not isinstance(merged_data, dict) or "kegg_df" not in merged_data:
logger.error(
f"[UC-4.4] Invalid data format: expected dict with "
f"'kegg_df', got {type(merged_data)}"
)
raise PreventUpdate
df = pd.DataFrame(merged_data["kegg_df"])
# Validate 'Sample' column exists (check variants)
sample_col_variants = ["Sample", "sample", "sample_id", "SampleID"]
sample_col = None
for variant in sample_col_variants:
if variant in df.columns:
sample_col = variant
logger.debug(f"[UC-4.4] Found sample column: '{variant}'")
break
if not sample_col:
logger.error(
f"[UC-4.4] Required column 'Sample' not found. "
f"Available columns: {df.columns.tolist()}"
)
raise PreventUpdate
# Extract unique samples
samples = sorted(df[sample_col].dropna().unique())
logger.debug(
f"[UC-4.4] Extracted {len(samples)} unique samples: "
f"{samples[:5]}..." # Show first 5
)
# Create dropdown options
options = [{"label": sample, "value": sample} for sample in samples]
logger.info(
f"[UC-4.4] Dropdown initialized with {len(options)} " f"samples"
)
return options, None
except Exception as e:
logger.error(f"[UC-4.4] Dropdown initialization error: {e}")
raise PreventUpdate
@app.callback(
Output("uc-4-4-chart-container", "children"),
Input("uc-4-4-sample-dropdown", "value"),
State("merged-result-store", "data"),
prevent_initial_call=True,
)
def render_uc_4_4(
selected_sample: Optional[str], merged_data: Optional[dict]
) -> Any:
"""
Render UC-4.4 radar chart for selected sample.
This callback generates a radar chart visualization showing the
functional fingerprint of the selected sample across all metabolic
pathways based on unique KO counts.
Data Processing (inline):
1. Extract KEGG data from store
2. Validate required columns
3. Filter by selected sample
4. Pass filtered data to PlotService
5. RadarChartStrategy processes:
- Groups by Pathway
- Counts unique KOs
- Creates radar chart
Parameters
----------
selected_sample : Optional[str]
Selected sample from dropdown.
merged_data : Optional[dict]
Merged data from store with 'kegg_df' key.
Returns
-------
dcc.Graph or html.Div
Radar chart component or informative/error message.
Raises
------
PreventUpdate
If no sample selected or no data available.
"""
if not selected_sample:
logger.debug("[UC-4.4] No sample selected, preventing update")
raise PreventUpdate
if not merged_data:
logger.warning("[UC-4.4] No data available")
return _create_error_message("No data available for visualization")
try:
# Extract KEGG DataFrame from store
logger.debug(f"[UC-4.4] Received data type: {type(merged_data)}")
if not isinstance(merged_data, dict) or "kegg_df" not in merged_data:
logger.error(
"[UC-4.4] Invalid data format: expected dict with " "'kegg_df'"
)
return _create_error_message(
"KEGG database data not found. "
"Please ensure KEGG data is loaded."
)
df = pd.DataFrame(merged_data["kegg_df"])
# Validate required columns with variants
required_cols_variants = {
"sample": ["Sample", "sample", "sample_id"],
"pathway": ["Pathway", "pathway", "pathname", "Pathname"],
"ko": ["KO", "ko", "ko_id"],
}
col_mapping = {}
for required, variants in required_cols_variants.items():
found = False
for variant in variants:
if variant in df.columns:
col_mapping[required] = variant
found = True
logger.debug(f"[UC-4.4] Mapped '{required}' → '{variant}'")
break
if not found:
logger.error(
f"[UC-4.4] Required column '{required}' not found. "
f"Available: {df.columns.tolist()}"
)
return _create_error_message(f"Missing required column: {required}")
# Normalize column names
rename_mapping = {}
if col_mapping["sample"] != "Sample":
rename_mapping[col_mapping["sample"]] = "Sample"
if col_mapping["pathway"] != "Pathway":
rename_mapping[col_mapping["pathway"]] = "Pathway"
if col_mapping["ko"] != "KO":
rename_mapping[col_mapping["ko"]] = "KO"
if rename_mapping:
df = df.rename(columns=rename_mapping)
logger.debug(f"[UC-4.4] Renamed columns: {rename_mapping}")
# Filter by selected sample
filtered_df = df[df["Sample"] == selected_sample].copy()
if filtered_df.empty:
logger.warning(
f"[UC-4.4] No data found for sample: " f"'{selected_sample}'"
)
return _create_error_message(
f"No data found for sample '{selected_sample}'. "
f"Try selecting a different sample."
)
logger.info(
f"[UC-4.4] Filtered data: {len(filtered_df)} rows for "
f"sample '{selected_sample}'"
)
# Remove NaNs from required columns
filtered_df = filtered_df.dropna(subset=["Pathway", "KO"])
if filtered_df.empty:
logger.warning("[UC-4.4] No valid data after removing NaNs")
return _create_error_message("No valid data found after data cleaning.")
# Generate plot using PlotService
# RadarChartStrategy handles aggregation
use_case_id = "UC-4.4"
logger.info(
f"[UC-4.4] Calling PlotService for {use_case_id} "
f"with {len(filtered_df)} rows"
)
fig = plot_service.generate_plot(use_case_id=use_case_id, data=filtered_df)
# Update title dynamically
fig.update_layout(
title=f"Functional Fingerprint for {selected_sample}", title_x=0.5
)
logger.info("[UC-4.4] [OK] Radar chart generated successfully")
try:
suggested = sanitize_filename("UC-4.4", "functional_fingerprint", "png")
except Exception:
suggested = "functional_fingerprint.png"
base_filename = os.path.splitext(suggested)[0]
return dcc.Graph(
figure=fig,
config={
"displayModeBar": True,
"toImageButtonOptions": {
"format": "svg",
"filename": base_filename,
},
},
style={"height": "650px"},
)
except ValueError as ve:
logger.error(f"[UC-4.4] Value error: {ve}")
return _create_error_message(str(ve))
except Exception as e:
logger.error(f"[UC-4.4] Rendering error: {e}", exc_info=True)
return _create_error_message(f"Error generating radar chart: {str(e)}")